1 Thessalonians 5:2

5:2 For you know quite well that the day of the Lord will come in the same way as a thief in the night.

1 Thessalonians 5:4-6

5:4 But you, brothers and sisters, are not in the darkness for the day to overtake you like a thief would. 5:5 For you all are sons of the light and sons of the day. We are not of the night nor of the darkness. 5:6 So then we must not sleep as the rest, but must stay alert and sober.